Thardy
I have an M7 x 0.85 and I wear glasses - the slim type to boot. Yet, I am unable to see the 35mm frames without heavy hunting with the eye. This camera is my dedicated 50 mm body for interiors. The 75mm frames are very useable, while the 90 and 135mm frankly are a misunderstanding, but this is a fact of life with all rangefinders.
The biggest problem of this VF, is that the 50 and 75mm - the 2 most useful and usable frames, are shown together, for a very messy view. This is just another wonderful arteriosclerotic invention from Leica's heritage. Therefore, if you want a Leica, and you want a decent view with a 50mm, you better get an M3 with the 1.0 VF - I tried it, and you can see the frames in an acceptable manner.
I don't want to repeat myself too much, as someone has accused me of being a Zeiss employee in disguise, but for a glass wearer, the Zeiss Ikon is a much better tool.